The document discusses the history and development of the cell theory, outlining key figures like Robert Hooke, Anton van Leeuwenhoek, and Rudolf Virchow and their contributions to early microscopy and the realization that all living things are made of cells. It also explains the main postulates of the classical cell theory and provides a modern interpretation, noting that cells contain genetic material, their activity dictates the organism, and cells of the same species have identical genetic makeup. The objectives are to describe the cell theory postulates and explain the characteristics that define all living organisms.

2. • Good Morning
• Grade 11 STEM

5. Wall of EMOTIONS

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7. Cell Theory

8. 03
• Differentiate the classical and modern cell
theory
• Explain the characteristics that all
living organisms have in common
02
01
Objectives
• Describe the different postulates of the cell
theory

9. What makes
any living
thing alive?

10. Let's Play

11. ARE YOU

12. Rabort Haak

13. Robert
Hooke

14. Muycrigrupey
u

15. MICROGRAPI
A

16. Onten Von Luuiwunheuk

17. Anton Van Leeuwenhoek

18. Ridelf Varchew

19. Rudolf
Vichow

20. Thueder
Schowon

23. • who first coined the term "cells"
• Micrographia in 1665
• He observe a slice of cork
• First microscopic pores
Robert Hooke (1635- 1703)

24. Robert Hooke
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25. Anton van Leeuwenhoek
(1632- 1705)

26. Anton van Leeuwenhoek
Observe many cells and organisms
such as:
• Rotifers
• Bacteria
• Sperm cells
• Blood cells
A Dutch Scientist that state
that cell is a unit of life

27. Henri Dutrochet (1776-1847)
a French physiologist who
suggested that the cell is not
just only a structural unit of life
but also a physiological one.

28. • Poposed that all animals is
composed of cells and product of
cells.
• He even proposed that both
animals and plants are governed
by the same fundamental
principles of cells.

29. Matthias Jakob Schleiden
• proposed that all plants are
made up of cells .
• Suggest that the cells were
formed due to crystallization
rather than crystallization

30. Rudolf Virchow and Robert
Remak
• Cells arise from pre-
existing cells through cell
division.
• Omnis cellula e cellula
• “All cells come from cells”
• Every cell is born of a previous
cell, which was born of a
previous cell.

31. Cell Theory

32. Cell is the smallest
entity that exibits
the characteristics
of life.

33. 1. Reproduction
• Cells produce new
cells of the same
kind through cell
division.

34. 2. Development
• Overtime a multitude of cell
divisions will change an
organism’s form from simple to
a complex one.

35. 3. Movement
• To better interact with its
environment and have a higher
chance of surviving, a cell must
be able to change its physical
position

36. 4. Responsiveness
• Cells react
accordingly when
they encounter other
organisms or objects.

37. 5. Metabolism
• Cell utilize the energy that they
obtain from their diet for daily
activities.
• Forms of energy are assimilated by
cells and transformed into other
forms for use by the cell of
neighboring tissues.

38. 6. Homeostasis
• A cell can maintain a stable
internal environment in the face
of changing external conditions.
It achieves this by creatin a
feedback loop, which is a
reaction to any disturbance or
perturbation in the cell’s bodily
functions that restores the latter
to it’s original state.

39. 7. Organization
• A cell is made up of smaller
units called organelles.

40. 8. Presence of Genes
• All life forms contain information
in the form of genes that allow
them to pass on their physical
traits to their offspring.

41. 9. Evolution
• Cells with better adaptations
with respect to their
environment will have a higher
chance of surviving.

42. Cell Theory
1. All organisms are made up of cells
• Protobiont-first cell which look
like a bacterial cell
• Archaea, bacteria and eukarya

43. 2. The cell is the basic structural and
functional unit of life
• Physiological
• Biochemical
• Genetic
• And other functions

44. 3. All cells arise from pre-existing cells
• Mitosis
• Cell division
• Meiosis

45. • Energy flow within the cells
• Inside the cell, there are lot of biochemical
reactions that regularly take place. When chemical
bonds get broken inside the cell energy is
produced. Meanwhile, chemical bond formation
uses up energy.
Modern Interpretation of Cell Theory

46. 2. Cells contain genetic material that can be
passed on.
• All cells have a certain genetic materials, which can either be
DNA or RNA or both. These genetic materials are self-replicating
and are essential in cell-division. They contain genetic
information that drives the functions of entire cell and ultimately,
the organism
Modern Interpretation of Cell Theory

47. 3. The activity of an organism depends on
the activity of each individual, independent
cell.
• Movement, metabolism and division.
• The cells in each type of tissue are
functionally related but posses a certain
degree of independence.
Modern Interpretation of Cell Theory

48. 4. The genetic makeup of the cells of
organisms that belong to the same species
is the same.
• All organisms belonging to the same species
have cells that are structurally and
physiologically similar.
Modern Interpretation of Cell Theory

49. Any
questions?

50. About Cells
• Who are the proponents of
cell theory?
• Give at least 5 functions of
the cell that is shown
through characteristics of
life.
• What is the importance of
understanding the cell
theory?

51. Create an infographic that can show
the timeline of formulating the cell
theory. Make it creative and
informative